Phylogeography of Asian wild rice, Oryza rufipogon: a genome‐wide view

摘要: Asian wild rice (Oryza rufipogon) that ranges widely across the eastern and southern part of Asia is recognized as direct ancestor cultivated (O. sativa). Studies geographic structure O. rufipogon, based on chloroplast low-copy nuclear markers, reveal a possible phylogeographic signal subdivision in O. rufipogon. However, this differentiation not consistently observed among different markers studies, with often conflicting results. To more precisely characterize phylogeography O. rufipogon populations, genome-wide survey unlinked intensively sampled from entire range critical. In study, we surveyed sequence variation at 42 tagged sites (STS) 108 accessions throughout native species. Using Bayesian clustering, principal component analysis amova, conclude there are two genetically distinct groups, Ruf-I Ruf-II. The groups exhibit clinal pattern generally north-east to south-west. Different many earlier Ruf-I, which found mainly China Indochinese Peninsula, shows genetic similarity one major variety, O. satvia indica, whereas Ruf-II, South be closely related varieties. other O. sativa japonica, similar either groups. Our results support hypothesis single origin domesticated China. role palaeoclimate, introgression migration-drift balance creating also discussed.